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- From: Karl_Kleinpaste@cs.cmu.edu
- Newsgroups: comp.mail.misc
- Subject: Re: e-mail headers
- Message-ID: <BzGwuK.AFD.2@cs.cmu.edu>
- Date: 18 Dec 92 18:29:31 GMT
- Article-I.D.: cs.BzGwuK.AFD.2
- References: <1992Dec17.181501.1@evax0.eng.fsu.edu>
- Sender: news@cs.cmu.edu (Usenet News System)
- Organization: Carnegie-Mellon Univ, Nectar Project
- Lines: 26
- Nntp-Posting-Host: godiva.nectar.cs.cmu.edu
-
- willis@evax0.eng.fsu.edu writes:
- <921217155244.22202e59@EVAX0.ENG.FSU.EDU>
- I know that 921217 is the date and that 155244 is the time the message
- was sent/received, but I don't know what .22202e59 means (given - I
- knew the name of the sender from the other header information that was
- excluded). If there is some documentation or books around that
- describe this example as well as other aspects of e-mail and e-mail
- headers, I would be glad to find out how to access it. Thanks in
- advance.
-
- You can ftp to nic.ddn.mil and look in the "rfc" directory, where you
- should pick up RFC822, which is the overall reference for Internet-
- compliant mail.
-
- On the other hand, the exact contents of Message-Id headers are
- implementation-dependent. There is no reason why a Message-Id must
- contain time-of-day or anything else that's readily identifiable. As
- a practical matter, and since the goal of a Message-Id is to give a
- guaranteed-unique identifier, a combination of the date/time plus some
- process identification information, for the process which created the
- message, is typically used. Hence, if you're on a UNIX system running
- (e.g.) sendmail as a mail transport, the "22202" is probably the UNIX
- process id of the sendmail invocation which took care of the message.
- I can't place the "e59" portion, however.
-
- --karl
-